title: The double-stranded ladder-like structure of poly[[bis(μ2-acetato-κ(2)O:O')bis(acetato-κO)bis(μ-4,4'-bipyridine-κ(2)N:N')dicopper(II)] 4-nitrophenol disolvate tetrahydrate].
abstract: The reaction of 4,4'-bipyridine with copper acetate in the presence of 4-nitrophenol led to the formation of the title compound, {[Cu(CH3COO)2(C10H8N2)]·C6H5NO3·2H2O}n. The complex forms a double-stranded ladder-like coordination polymer extending along the b axis. The double-stranded polymers are separated by 4-nitrophenol and water solvent molecules. The two Cu(II) centres of the centrosymmetric Cu2O2 ladder rungs have square-pyramidal coordination environments, which are formed by two acetate O atoms and two 4,4'-bipyridine N atoms in the basal plane and another acetate O atom at the apex. The ladder-like double strands are separated from each other by one unit-cell length along the c axis, and are connected by the water and 4-nitrophenol molecules through a series of O-H···O and C-H···O hydrogen-bonding interactions and two unique intermolecular π-π interactions.
authors.affiliation: School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa.
authors.forename: Sizwe J
authors.initials: SJ
authors.lastname: Zamisa
authors.forename: Patrick
authors.initials: P
authors.lastname: Ndungu
authors.forename: Bernard
authors.initials: B
authors.lastname: Omondi
keywords: crystal structure; double-stranded ladder-like coordination polymer